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author | Fangrui Song <maskray@google.com> | 2019-08-02 07:18:07 +0000 |
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committer | Fangrui Song <maskray@google.com> | 2019-08-02 07:18:07 +0000 |
commit | 681afdf34bb16d1877e984d157dfd389a79a4256 (patch) | |
tree | 4e3f851ec5cfff68846a11843577ed58d4fdd430 /test/tsan/fd_dup_norace2.cc | |
parent | 871e3822d6679af8f7cfa763b65258e47f2d8d69 (diff) | |
download | compiler-rt-681afdf34bb16d1877e984d157dfd389a79a4256.tar.gz |
compiler-rt: Rename .cc file in test/tsan to .cpp
Like r367463, but for test/tsan.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@367656 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/tsan/fd_dup_norace2.cc')
-rw-r--r-- | test/tsan/fd_dup_norace2.cc | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/test/tsan/fd_dup_norace2.cc b/test/tsan/fd_dup_norace2.cc deleted file mode 100644 index 31aaed9d3..000000000 --- a/test/tsan/fd_dup_norace2.cc +++ /dev/null @@ -1,60 +0,0 @@ -// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s -#include "test.h" -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <errno.h> - -// dup2(oldfd, newfd) races with read(newfd). -// This is not reported as race because: -// 1. Some software dups a closed pipe in place of a socket before closing -// the socket (to prevent races actually). -// 2. Some daemons dup /dev/null in place of stdin/stdout. - -int fd; - -void *Thread(void *x) { - char buf; - int n = read(fd, &buf, 1); - if (n != 1) { - // This read can "legitimately" fail regadless of the fact that glibc claims - // that "there is no instant in the middle of calling dup2 at which new is - // closed and not yet a duplicate of old". Strace of the failing runs - // looks as follows: - // - // [pid 122196] open("/dev/urandom", O_RDONLY) = 3 - // [pid 122196] open("/dev/urandom", O_RDONLY) = 4 - // Process 122382 attached - // [pid 122382] read(3, <unfinished ...> - // [pid 122196] dup2(4, 3 <unfinished ...> - // [pid 122382] <... read resumed> 0x7fcd139960b7, 1) = -1 EBADF (Bad file descriptor) - // [pid 122196] <... dup2 resumed> ) = 3 - // read failed: n=-1 errno=9 - // - // The failing read does not interfere with what this test tests, - // so we just ignore the failure. - // - // exit(printf("read failed: n=%d errno=%d\n", n, errno)); - } - return 0; -} - -int main() { - fd = open("/dev/urandom", O_RDONLY); - int fd2 = open("/dev/urandom", O_RDONLY); - if (fd == -1 || fd2 == -1) - exit(printf("open failed\n")); - pthread_t th; - pthread_create(&th, 0, Thread, 0); - if (dup2(fd2, fd) == -1) - exit(printf("dup2 failed\n")); - pthread_join(th, 0); - if (close(fd) == -1) - exit(printf("close failed\n")); - if (close(fd2) == -1) - exit(printf("close failed\n")); - fprintf(stderr, "DONE\n"); -} - -// CHECK-NOT: WARNING: ThreadSanitizer: data race -// CHECK: DONE |